Burglar and fire alarm.



WILLIAM J. DRIVER, or onronoo, ILLINoIs, 'AssIGNoR ro THE DRIVER Finn & IBURGLAR ALARM COMPANY, or CHICAGO, ILLINOIS, A CORPORATION or ABIZONA.

BURGLAE AND FIRE ALARM.

Specification of Letters Patent.

Patented oet. a, rare.

Application filed October 16, 1912. Serial N 0. 726,041.

To all whom it may] concern Be it known that I, lVILLIAM J. DRIVER, a citizen of the United States of America, residing at Chicago,'in the county of Cook and State of Illinois, have invented certain new and useful Improvements-in Burglar a specification. r V I i This inventlon relates to mprovements in a mechanical alarm-giving device adapted to be used in connection with a door or window of a house in such a manner as to sound an alarm in the movement of either in the operation of opening the same, and in some instances, for producing an alarm in case of fire; and it consists in certain peculiarities of the construction, novel arrangement and operation of the various parts, as will be hereinafter more fully set forth and specifically claimed.

The main object of the invention is to provide a burglar and fire alarm, the parts of which shall be so constructed that they may be arranged in such a-manner that the door orwindow may be'epened or closed \vithout'aflecting the device or giving an alarm, yet may be adjusted or arranged so that a slight movement of the door,-' or one of the sashes of the window, in opening the same, will sound an alarm,- and sometimes in case of a fire in the room, an alarm will be given. j

Another object is to provide an alarm-giving device of the above named general character which shall be simple and inexpensive in construction, strong, durable and efficient in operation. 7

Other objects and advantages of the'invention will be set forth in the following description and explanation.

In the accompanying drawings which serve to illustrate the invention Figure 1 is V a face view of a portion of a door and its leased or unlocked positions; Fig. 5 is a view similar to Fig. 3, showing a slightly modified. form of the locking means.

Like numerals of reference refer to like parts throughout the different views of the drawings. and Fire Alarms, of which the following is The reference numeral 25 designates a portion of a door, and the numeral 26, a part of the frame thereof; To the door is applied near its edge adjacent to the frame 26, a base plate ,27, which has centrally and revolubly journaled therein a spindle 28, on

the front or outer end of which is mounted a bell 29, of the usual shape.

Mounted on suitable studs 30, projected forwardly from the plate 27, is a casing plate 31, for the spring 32, of the alarm, which spring is fastened at one of its ends to the spindle 28, and at its other end to an annular flange 32, with which the front surface of the plate 31, is provided, and which flange and plate 31, together with the bell 29, form a casing for the said spring.

Journaled on the face of the plate 27, and between it and the plate 31,- are a train of gears which unite an escapement wheel 33, which is also journaled on the plate 27 with a gear 34, mounted on the spindle 28, at the rear of the plate '31, which plate has pivotally mountedthereon a pawl 35, to engage nected by means of a resilient arm 39, which armextends to near the periphery of the bell so that the hammer 38, may strike the.

latter when the pawl 37, is vibrated by the movement of the escapement wheel.

' I Slidab'ly mounted on the face of the plate 27, is alocking and releasing bar 40, which is provided in its inner portion with a slot 41, to receive the spindle 28, and has its other end projected beyond the plate 27, and edge of the door adjacent'to the door frame,

as will be understood by reference to Fig. 1 of the drawings. This bar is movably held on the plate 27, by means of guides 42, and 43, as well as by means of the spindle 28,

and has in its lower portion, near its free.

end,- a recess 44, to engage the guide 43, when said bar is in the position shown in Fig. 3, in which position the alarm giving mechanism will be locked thereby;' The bar 40,

has on its lower portion just below the slot 41 therein, a depending and laterally eX- tended lip 45, for engagement with a lug 46, on the inner end of the tripping bar 47, which is slidably mounted on the plate 27, and has at its outer end a thumb piece 48, by means of which it may be moved back and forth. The bar 47, is movably held on tie plate 27, by means of guides 49 and 50, and has near its inner end a recess 51, to engage the guide 49, when said bar 'is' in its eX- tended position as shown in Fig. 3 of the drawings. This bar has on its upper portion inwardly of the upper guide 50, there for, a detent 52, to rest against the arm 39, which connects the hammer 38, to the pawl 37, and will prevent the movement of said parts. Secured at one of its ends to the inner end of the bar 47, is a spring 53, which is secured at its other end to the plate 27, and serves to press the lug 46, on said bar against the laterally disposed lip 45, on the bar 40, the guides 49 and 50, for the bar 47, being so arranged as to permit slight upvard movement of the inner portion of the last named bar. Connected at one of its ends to the bar 40, is a spring 54, which is secured near its other end to the plate 27, and is arranged to actuate the bar 40, out wardly and upwardly when the same is released at its front portion from the guide43 therefor. When this bar is released from the guide 43, it will be caused, through the instrumentality of the spring 54, to assume about the position shown in Fig. 4, in which movement the lip 45, will be moved in the opposite direction from the bar 47 so as to disengage it from the lug 46, on the last named bar, when by reason of the action of the spring 53, the bar 47 will be disengaged from the guide 49, and be moved to about the position shown in Fig. 4, thus disengaging the detent 52, from the arm 39, of the hammer, thereby permittting the pawl 37, to vibrate and to intermittently release and engage the escapement wheel 33, which will be driven by means of the spring 32, and the train of gears which connect it to the spindle In the above named movement of the bar 40, it will be understood that the end of the lip 45 thereon, adjacent to the bar 47 will be projected from over the lug 46, on the last named bar, and that the spring 53, will press the bar 47, upwardly until the lug 46,

assumes a position above the lateral lip 45, when by reason of the action of the spring 53, the lug 46, will be caused to engage the upper surface of said lip, as shown by dotted lines in Fig. 4, thus holding the bars 40 and 47, in their projected positions and allowing the alarm to be sounded until the bar 40 is retracted, so that its recess 44, will engage the guide 43, and hold said bar in its retracted position.

In connection with the mechanism described, I provide a trip for the bar 40, which trip forms no part of the present invention, and while generally illustrated in Fig. 1 of the drawings, may be briefly described as including a plate 55 secured to the frame for the member, to which the alarm is secured, and having an outwardly eXtended portion 56, which is pivotally mounted at dog 59 formed at its upper end with the projection 61 to strike the bar 40 when the door is open.

In Fig. 5 I have shown an alarm mechanism particularly intended for use on window frames, in which the alarm is mounted on the window casing. The detail construction of the alarm mechanism is similar to that previously described, the modification differing from the previous form in that the bar 40 is provided at its outer end with a. lip 109 and the lower edge of the bar 40 with a recess 111 adapted to be engaged by the innor end of; the bolt 112 slidably mounted in guides 113 formed or secured on plate 27. A spring 114 tends to normally press the bolt into locking cooperation with the bar, the spring loosely bearing beneath the projection 115 on the bolt. The free end of the bolt has an opening 116, and connections, not shown, are designed to be attached to the bolt and to the free end of the bar 40 through the lip 109, said connections serving to provide for automatic operation ofthe alarm through releasing the bar under predetermined conditions.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is 1. An alarm including a main plate, a spindle revolubly mounted thereon, a train of gearing arranged on the plate, means for operating said gearing, a bell casing carried by the plate, a hammer for the casing mounted on the plate and operated by a train of gearing, a releasing bar mounted for slid-ing movement in the plate, means for sliding the bar in one direction, means for locking the bar against the influence of the sliding means, and a trip bar mounted for limited sliding and swinging movement on the plate, said trip bar being formed for locking cooperation with the plate and with the hammer, means to accommodate the trip bar to release position, and means carried by the first releasing bar to hold the trip bar against movement under the influence of its releasing means.

2. An alarm including a plate, a bell thereon, a hammer, means for actuating the hammer, and locking means for the hammer including a trip bar adapted in one position to be locked against movement relative to the plate and formed with means to engage and prevent movement of the hammer, a sprlng for actuating the trip bar to first release it from its locked relation to the plate, and then shift it to release the hammer, and a releasing plate normally'holding the trip bar against action of its spring.

3. In a device of the character described,

, the combination with a base or main plate having means to secure it to a support and provided on one of its faces with guides, a spindle revolubly mounted on said plate, an escapement wheel journaled on said plate, a forked pawl pivoted on the plate and adapted for intermittent engagement with said wheel, a gear train journaled on the plate and connecting said wheel and the spindle, an arm having at one end a hammer and connected to said pawl, a casing including a bell mounted on and surrounding the spindle, a spring coiled around the spindle within said casing and secured at one of its ends to the spindle and at its other end to the casing, a spring actuated bar slidably mounted in the guides on said plate and extended at one end beyond the latter, said bar having near its outer end a recess to engage one of said guides, another bar slidably mounted on said plate and extended therefrom oppositely from the projected portion of the first named bar, means on the last named bar to detachably engage the hammer arm, and means also on said bar to detach- Gopies of this patent may be obtained for ably engage the first named bar, and means at the outwardly projected portion of the first named bar to release the same.

4. An alarm including a plate, a bell thereon, a hammer, means for actuating the hammer, and locking means for the hammer including a trip bar adapted in one position to be locked against movement relative to the plate and formed with means to engage and prevent movement of the hammer, a spring for actuating the trip bar to first release it from its locked relation to the plate, and then shift it to release the hannner, a releasing bar mounted for sliding movement in the plate, a projection carried by said bar to engage and hold the trip bar against the influence of the spring when the releasing bar is in one position, means for locking the releasing bar in said position, and means for actuating the releasingbar to free the trip bar when said releasing bar is relieved of its look.

In witness whereof, I have hereunto subscribed my name this 11th day of Oct, 1912, in the presence of two subscribing witnesses.

WILLIAM J DRIVER.

Witnesses:

CHAS. C. TILLMAN, A. S. PHILLIPS.

five cents each, by addressing the Commissioner of Patents. Washington, D. 0. 

